Plants and Algae Most Recently Shared a Common Ancestor 480

question 45

Multiple Choice

Plants and algae most recently shared a common ancestor 480 million years ago,and plants colonized land shortly after that.Light,water,minerals,and dissolved gases surround the whole body of a submerged green alga,and the buoyancy of water provides physical support.What adaptation did plants make in taking up water and minerals when they moved to dry land?

• A) production of lignin
• B) production of a cuticle
• C) production of pollen
• D) development of vascular tissue
• E) development of stomata

---

Definitions:

Hydrogen Sulfide

A colorless, poisonous, flammable gas with the characteristic foul odor of rotten eggs; used in the manufacture of chemicals, in metallurgy, and as a fungicide and insecticide.

Lewis Structure

A graphical representation of molecules showing how valence electrons are distributed among atoms, and where dots and lines represent electrons and bonds, respectively.

Water

A molecule composed of two hydrogen atoms bonded to one oxygen atom, essential for all forms of life.

Helium

The second lightest and second most abundant element in the universe, a noble gas that remains liquid at the lowest temperatures.